package javaBase.nowcoder.HJ76_A_尼科彻斯定理;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main {

    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String str1 = br.readLine();
        Integer num = Integer.parseInt(str1);
        Integer first = 0;
        for (int i = num * num; i > 0; i--) {
            if (i + num - 1 == num * num) {
                first = i;
                break;
            }
        }
        System.out.print(first);
        for (int i = 1; i < num; i++) {
            System.out.print("+" + (first + i * 2));
        }

    }
}
